Port on side of Automat

Perhaps I missed it in the documentation somewhere, but what does the 12-pin port on the side of the Automat do? Is that for daisy-chaining devices?

@Shivasongster I am working on some extension modules to connect to this port. The first one will probably be an CV / Trigger Input Extension. The available pins on the connector are for I2C and SPI + 3.3V / 5V and GND